title: Formation of a new benzotriquinane skeleton via intramolecular photocycloaddition reactions of a phenylethynes moiety to a 1-cyanonaphthalene ring system.
abstract: Photoirradiation of 1-cyano-2-(2,2-dicyano-5-phenylpentyn-4-yl)naphthalene and its analogues promotes sequential intramolecular [2π + 2π] photocycloaddition and cyclobutene ring opening to form benzocyclooctatetraenes, which are then transformed to benzotriquinanes in good yields via a photochemical transannular cyclization process.
authors.affiliation: 1-1 Gakuen-cho, Naka-ku, Sakai, Osaka 599-8531, Japan. mizuno@chem.osakafu-u.ac.jp ikeda@chem.osakafu-u.ac.jp.
authors.forename: Kazuhiko
authors.initials: K
authors.lastname: Mizuno
authors.forename: Naoki
authors.initials: N
authors.lastname: Negoro
authors.forename: Yoshinori
authors.initials: Y
authors.lastname: Nagayama
authors.forename: Hajime
authors.initials: H
authors.lastname: Maeda
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Ikeda